Property, Plant and Equipment, Net (Tables)

12 Months Ended

May 31, 2023

Property, Plant and Equipment [Abstract]

Property, plant and equipment

Refer below for useful lives by category:

	Estimated useful lives
Building and building improvements	4 to 39 years
Computer software and equipment	2 to 5 years
Machinery and equipment	5 to 8 years
Placement and evaluation units	5 years

Property, plant and equipment are summarized as follows:

(in thousands)	May 31, 2023		May 31, 2022
Building and building improvements	$	29,660	$	29,425
Computer software and equipment	27,435		27,292
Machinery and equipment	17,023		15,453
Placement and evaluation units	26,355		21,009
Construction in progress	2,444		2,402
	102,917		95,581
Less accumulated depreciation	(59,026)		(51,069)
	43,891		44,512
Land and land improvements	493		493
	$	44,384	$	45,005